1980 inline 6 misfire

[josh5532]

I have a 1980 cj7 with inline 6. It's only running on the 1,3,4 cylinder. When I unplug the 2,5,6 plug wires it runs almost the same. I have checked to see if it has spark and they all have good spark. I have checked cylinder compression and it is good. Please help with any ideas if stuff to check. The engine is carburated. Thanks

 

[superj]

what are your vavles set to? also, are your wires backward on the distributor

 

[josh5532]

153624 is the firing order I have set. I bought the engine as a rebuilt so not sure on the valves. I will check them tonight.

 

[josh5532]

I may have figured it out. The guy I bought the engine from said it was a 1980. I checked the casting number and it's 3218618. Which would make it a pre 1975 and change the firing order. I am going to put it back together and try it

 

[superj]

Ok